Can certain diseases cause paranoia similar to that seen in individuals with paranoid schizophrenia, even if they do not have the disorder?
Last Updated: 02.07.2025 13:01

Some of those things on the list are very very rare cases but I just wanted to cover everything (or almost everything).
Dementia and drug use cause paranoia. That is very common. Some of other things that can include delusions and/or hallucination can be:
Alcohol
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Infection
Alcohol withdrawal
Mental disorder
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Charles Bonnet syndrome
Migraines
Stress
Narcolepsy
Hallucinogen use
Grief (yes, sadly)
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Affective disorders
Alzheimer's disease,
PTSD
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Delirium tremens
Brain Tumors
Withdrawal from benzodiazepines
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Seizures
Head injury
Dementia with Lewy bodies
Bipolar disorder
Pharmaceutical drug (abuse or side effects)
Parkinson's disease
Fever
⁉️sources from my experiences and internet research ⁉️
Sleep disorders